Sewer System Improvement Program (SSIP)

Nationwide, utilities are grappling with aging infrastructure, and San Francisco is no exception. Portions of our combined sewer system are over 100 years old. Routine repairs are not sufficient to keep pace with our aging and seismically vulnerable infrastructure. It is crucial that we upgrade our system now to ensure we can continue to protect public health, the environment, and our local economy. As we make these critical investments in our infrastructure, our community benefits program is also investing in a sustainable future for the people and places that make our region so special.

The Sewer System Improvement Program (SSIP) is a 20-year citywide investment to upgrade our aging sewer infrastructure to ensure a reliable, sustainable and seismically safe sewer system now and for generations to come.

Across the San Francisco, we are upgrading our grey infrastructure and incorporating green infrastructure to better manage stormwater runoff. Find out more about the difference between grey and green projects by clicking on the links below.

The SSIP is a combination of grey, green, and clean and is divided into three overlapping phases to maintain affordability. Phase 1 has been approved by our commission representing $2.9 billion. This first phase is comprised of 70 grey and green infrastructure projects across the city.